It being a while since Mycroft has found any slayer, he calls Andrea for an update. Her knowledge of the supernatural world has proven useful tonight. Combined with her technological abilities, she's able to send each of them the most up-to-date information for the area that they're in. (It is, apparently, futile for him to keep searching here. This whole quadrant has been cleared out, with the help of some of his connections.)
"Six dusted," Andrea says, "and two werewolves dead as well."
Mycroft feels ill at the thought of vampires getting dusted, but he knows that if Sherlock and John were some of the casualties, then he'd have been contacted immediately. (He knows his mother is far too careful with her long-distance abilities from years of sniper training, and Lestrade has Molly Hooper to steer him into the clear. It's only John and Sherlock at serious risk.)
He swallows back all of the irrational worry that he has, attempting to remain stoic. His family is fine, will be fine. (Has to be fine.) "My brother and John Watson?"
"Your brother was clipped by a wooden bullet, but nothing serious. And John Watson is perfectly fine. They've just swept Belgravia and are heading for Holland Park. They'll come across several in Kensington, but nothing that they can't handle."
"And the others?"
"No need for you to worry, sir. Your mother has broken her own record, and Miss Hooper's abilities are proving even more successful than expected."
"I'm not worrying." (Though Mycroft knows she can see through his lies, he has a façade to maintain. In a way, it's an odd sort of comfort that this provides him with.)
"Never said you were. I'll let you know when you have a reason to be."
"Good. And, Andrea?"
"Yes, sir?"
"You may extend your leave by five days."
He can hear the smile in her voice. "Thank you, sir."
The phone call ends and Mycroft sighs, relieved to hear that everyone's still alright. Checking the bindings on his leg, he scrapes a hand through his hair. There still remain slayers for him to eliminate in the other quadrants, and he'd better head for Holland Park. There's going to be plenty of slayers around there. (Hopefully, his brother won't underestimate them.)